Hi Jesús, > I am getting ready to migrate to Zope 4, and checking products I depends > massively on ExtFile/ExtImage. I wonder about the support of that > product or something similar.
I also inherited a Zope app, and successfully migrated it to Zope 4/5. I guess I do not have to tell you the general way how to migrate an app to Python 3 (pyupgrade, six...). So, some Zope specifics. Zope 4 is a transition version, between Zope 2 (Python 2) and Zope 5 (Python 3), as Zope 4 both supports Python 2 and 3. As you already did, it is important to catalog all your used plugins and check whether they are still supported, can be replaced by core functionality or another plugin, or even need to be ported to Zope 4. My inherited legacy app even had two similar plugins to your ExtFile one, namely ExternalFile and LocalFS - both have no successors. I could replace LocalFS entirely with Zope core functionality, in this case with resourceDirectory ( https://docs.plone.org/adapt-and-extend/theming/templates_css/resourcefolders.html ). ExternalFile was rewritten from scratch, and now is only like 20 lines, which read a file from the file system and just return it to the browser. So, no clue whether one or the other solution would fit your usecase. When you want to work on the migration yourself, have a look at the docs... https://zope.readthedocs.io/en/latest/migrations/zope4/index.html# Generally, it is best to upgrade to the latest version 2 of Zope, first, before trying to update to Zope 4. Michael, one of the core maintainers, gave a talk at EuroPython about a successful Zope migraton: https://www.youtube.com/watch?v=O-xSmvQwPHY https://community.plone.org Just for completion, if you need commercial support, you can post here: https://community.plone.org/c/jobs/38 And as already mentioned, https://community.plone.org is a good place to ask questions. This mailing list is super low volume. Best, Jürgen
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